Deaerating water heater



- Sept. 13,1932. P. s. LYofi DEAERATING WATER HEA TER Filed Oct. 20, 1928 2 Sheets-Sheet l lfiVENTOR PfRCY 5. A VON BY W 8 1 TTORNEY 2Sheets-Sheet 2 P.S.LYON DEAERATING WATER HEATER -%i1ed Oct. 20, 1928 iii:11? $2111: 25?" z: K5 K I E: I:-

. UNETE STATE-S Patented Sept. 13, 1932 EN i 1 rnnov srvon; or roarWAYNE, :IND'IANA, AssreNoR'ro COGHRANE' CORPORATION,

' or PHILADELPHIA, PENNSYLVANIA, A COR-BORATIONDF rnlvnsynvanrajtDanna-Arnie wanna HEATER "j Application filed. October 20, iszafiseri rno. 313,716.

j The present invention relates to'apparatus for heating and deaeratingWater of the type in which raw Water previously heated in a heatexchanger to a predeterm ned. temperature is sprayed downwardly onto abank of: trays in which the descending Water contacts with andisscrubbed by steam passing upwardly through said tray bank to liberateair and other corrosive gases contained thereln,

and the invention is devised especially for" use in deaerating apparatusof the surface heater type i. e. apparatus in which the steam used forscrubbing the Water is generated" fromthe Water being deaerated bycontact with a-"heat exchanger comprising steam filled tubesintocontact'withyvhich the Water passes after leaving said tray bank.

deaera'ting apparatus of the character described the steam, notconden'sed during its 2 upward passage through the tray bankand the airand other gases liberated are passed into a'second heat exchanger orvent con" denser which may comprise one or tWo stages in which the majorportion of-the' steam is condensed and from which the uncondensed gasesand vapors are vented or dischargedby an ejector.

In installations heretofore made ofap paratus of the'type described theheat exchanger, vent condenser and deaerating heaterohave usually beenseparate pieces of apparatus and usually the vent condenser has beenmounted on the top of the deaerat ing heater. Installations ofthis typeoccupy considerable floor space and require a con-l sidcrable amount ofinterconnecting piping between the various pieces of apparatus.

"Economy in floor spaceand headroom is especially desirable withdeaerat'ing apparates of thetype described because that apparatus isparticularly adapted for domestic service use in hotels, apartments andbuildings presenting space restrictions and Where itis not desirable topermit the heating steam i to contact With the deaerated Water to beused for domestic purposes and Where it is advantageous to utilize thecondensate recov-- ered from the heat exchangers oi the paratus asboiler feed inn: itwith the hot-treated Water.

Water, rather than to Such apparatus is usually installed in the.basement of the building wherein floor space and headroom are usuallyvery limited, Deaerating heatersin present useare of sumcient' height tocausegreat diiilc'ulty in -i'n-{ stalling them in basements of normalheight.

In installations where the vent condenser is mounted on the top of theheater, the re quired amount'of headroom is :greatly in creased. Afurther disadvantage of the separate arrangement is that the'standardpumps available forpumping the Water fromthe Water storage compartmento'f the heater to a Theobject of my invention-is to provide an improved,arrangement and construction of apparatus for heatingan'dZd'eaeratingWaterWhich is characterized by the c0ns0lida-' tion'of thepreheater vent condenscr and deaerating heater in a single piece ofapparatus having considerably "less over-all height and requiring lesspiping and-floor space than the apparatus heretofore"infuse; A furtherobject of'my invention is to pro vide an improved form of deaeratingtray.

v The various features of novelty which char acterize my invention arepointed out with particularity in the claims annexedtoand ,torminm apart of this specification." For a better understanding of'the'invention, however, and the advantages possessed by it ref .erenceshould be had totheaccompanyingf drawings and descrintive matter inwhich I have illustrated and described a preferred embodiment of theinvention. Of the drawings 2 i i 1 Fig. 1 is'a front elevation of myimproved apparatus; V V a &

Fig.2'is'asideelevation; Fig. 3 is a plan view f Fig. 4 isa section onthe line H of Figrl; Fig. 5 is asectionon the line 5-5 of'Fig; 1; Fig. 6is a'section on the line 6 -6 of Fig. 2;

horizontal and vertical cross sections andincludes a water storagecompartment orchamber B in the lower portion of the shell, a'

deaerating compartment C above one side of the storage compartment, apreheater compartmentD above the other side of the storage compartmentand alongside the .deaerating compartment and. separated from, saidcompartments, and a vent condenser comzpartm'ent .E above thepreheatercompartment and at one side of'and connected to the deaeratingcompartment. As shown the shell is composed of metallic plates A 1shaped and connected as is usual in such rectangular shells. p 1

The vent condenser and preheater chambersor compartments are formed bypartitions mounted inone of the upper corners.

of the container and secured to the front,

'a rear, a side and top wall plates of the con taine-r. The partitionscomprise a vertical partitionF extending longitudinally of the heaterandseparating the chamber forn'ied from the deaerating compartment. Apair -"of;vertically spaced horizontal partitions- F 'and F extendlaterally from'the partition F and are integrally connected to theadjacent side wall. to-form an upper vent condenser compartment and alower'preheater compartment. A port Fis. formed in the rear portion ofthe partition'F above the partition F A horizontal row of U-shaped tubesE"- are positioned in the vent condenser com J: partment with the'op'enends of the tubes'secur d in a tube sheet Gr'closing the front end ofthe compartments D'and A steam ejector E is connected to the"compartment E-and serves to withdraw air and small amounts of vaportherefrom. The 'prehe'ater compartment Dis occupied by a plurality ofhorizontal rows of U-sh'aped tubes D,

each of said tubes having itsouter ends secured to the tube sheet G. Asshown in ithe elements D and E extend longitudinally of and throughoutthe major portion of the corresponding compartment. Aheader H having asubstantially smooth outer face and an inner faceformed with a pluralityof inwardly projecting transverse ribs H is secured to and covers thetubesheet G.

The header is provided withfianged inlet and outlet openings H and Hrespectively.

Each :rib is arranged to contact with the tube sheet at a level betwenthe'upper and lower legs of one of the rows of heating elements.

This arrangement provides a continuous closed path of flow for the waterpassing in at H through the tubular elements in each compartment to' theoutlet opening 1-1 L drain opening D is located adjacent the bottom: ofthe preheater compartment and an air outlet opening D adjacent the upperend of the compartment.

The lower edge of the plate-F and the opposite wall of the container areprovided with brackets J. at horizontally spaced points thereon and inwhich transverse members J are supported. As shown there are three ofsuch transverse members. A plurality of stacks of trays Kare mounted'onandextend from one to the other of the transverse membersJ The front ofthe deaerating chamberis closed by a tray door K, through which thetrays may be inserted or removed.

As shown in Figs 7 9, each of the trays K is formed with a flat bodyportion K" in which trans versely spaced slots K are arrange The aplurality of longitudinally extendin 7 portions of the tray bodyadjacent the slots K are formed with bosses K on the underside. As shownin Fig. 7 the slots are symmet-j rically arrangedrelative toalinelaterally dis-- placed from the longitudinal center line of thetray.- Each tray is provided at one end with a transverse lug K at itsupper. side intermediate the ends of the slots and adj acent end ofthetray. A flange K depends from the underside of the tray: at each sideedge thereof and has a depending'portion K", which is cut awayat itsouter 'end belowthe lug K to form a notch K7. The-opposite end of thetray has 7 an upper transverse lug K at its outer end and each marginalflange K is formed with a depending portion K having a notch K thereininwardly spaced from the lug K WVith each of the trays constructed" asdescribed, the trays are necessarily stacked with alternate trays in thereverse position and the lugs K and K of each tray fitting into thenotches K and K respectively, ofthe superposed tray. The slots K of eachtray of the stack are thus staggered relative to the slots of theadjacent upper and lower trays without requiring more than one form of Apair ofbrass pipes M, each having one end open and'threaded in the frontwall of the shell and the opposite end closed and supported by-the rearwall of the shell, are .1. mounted above the tray stacks. Each pipe isprovided with amultiplicity of perforations M in its upper side. Ribs Mare formed on the underside of the top wall of the shell and extendlongitudinally of the deaerating compartment on each side of each of theper- I forated pipes M.

. A horizontal battle N extends transversely A of the deaeratingcompartment closing the space between the rear transverse member J" andthe rear wall of the Compartment. A second transverse baiflle N closesthe space between the upper end of thetray stacks and the front wall ofthe compartment for a purpose hereinafter described.

. The water storage compartment B contains an inner and outer row ofU-tube elements B arranged with the legs ofeach element in the outer rowparallel with and surrounding the legs of the corresponding element intheinner row. The corresponding legs of the elements in each of the rowsare mounted in a tube sheet 13 covering an opening B inthe front wall ofthe shell. A steam chest 0 having an upper inlet chamber .0 andaloweroutlet chamber 0 covers and is secured to thetube sheet B with theupper legs of the elements B opening to the chamber 0 and the lower legsopening to the chamber 0 The upper chamber has a steam inlet opening 0and the lower chamber is provided with a vent opening 0 and a drainopening 0 The tubular elements may be above the water level in thecompartment or wholly or partially submerged. In the construction shown,the elements are substantially submerged. The elements are positionedbelow the center stacks of trays andextend longitudinally of thecompartment to a point adjacent the rear wall. 1 V

A float P mounted on alever arm 1? pivoted in the front wall of theshell is positioned in the storage compartment at one side. of thetubular elements B and controls the amount of water sprayed onto thedeaerating trays K. The water outlet H is connected by piping H to acommon inletH connected to the water distributing pipes M. A regulatingvalve H is positioned in the piping H adjacent the outlet. The valve His operated by a lever system H connected to the lever arm P ofthe'fioatvalve to increase and decrease the supply of waterasthe waterlevel in the storage compartment decreases and increases; respectively.A water outlet pipe B is connected to the bottom of the storagecompartment and leads to the inlet of a pump (not shown). A steam'inlet'pipe Q, having a thermostatlcally controlled valve Q, mountedt-herein isconnected to one side ,of the preheater compartment D for passing steaminto that compartment in contact with the preheater tubes. Thethermostatic element controlling the op eration of the valve is locatedin the storage compartment below the level of the water. A branch steampipe It extends externally of the shellfrom a point in the steam-inletpipe Q between the valve Q and heater to the upper chamber of the steamchest.

The general operation of disclosed 'is as follows: I V

Raw water is passed into the heater through the inlet H to the tubesforming the vent i condenserandthrough which it passesdisthe apparatus.All openingsand accessories areconfined to charging into the headercommon to the vent,

condenser-elements and first pass ofth'e premately that of thetemperature of the water leaving the heater at B before itpasses'to thedeaerating compartment. The heated water passes out throughthe'valve Hand piping H to the. waterdistrib extending above the tray elements. I

The water being under pressure is sprayed upwardly from the perforateddistributing pipes against the topwall'of the container uting pipes M.in the preheater D to a temperature approxi I and the spray isdeflected by the longitudinal ribs M? downwardly ontothe tray stacks. Innormal operation the water in "the storage, compartmentais at the outlettemperature desired and the heat supplied thereto by the evaporatorelements B is suflicient to convert 'a' portion of the water in thecompart mentiintosteam whichpass jes upwardly through and longitudinallybetween the tray stacks wherein it contacts with and scrubs the waterpassing downwardly'therethrough.

The.scrubbing'actiontaking place o'nfthef V finely dividedwaterassistsin-removing'the am. By the term air as used herein, I

mean to include'not only the constituents of atmospheric air dissolvedin the water and liberated from the latter inlthe apparatus, I

and other gases lib but also carbon dioxide erated from the waterin itstreatment. Any

steam 'not' condensedduring its passagev T through thetray stacks passesupwardlywith the separated air through the'portft into i i the ventcondenser compartment andafter contacting with the water tubes thereinis exhausted by the steam ejector connected thereto. The deaerated water.is withdrawn from the water storage compartment as needed by a suitablepump."

r The apparatus of my invention isl cha'racterized by its simplicity,efiectiveness and low cost of manufacture and installation. Only .asmall amount'of floorspace and a single foundation is required for theself-contained unit. The apparatus may be installed inloe cations havingvery limited headroom as the overall height of the unit is approximatelyfour feet.

standard pumps of'lowercost can be-used.

the front; one of the side walls and bottom of the unit, whereby theunit may be installed in a corner, having limitedheadroom. v'The Thisfeature is also advantageous m that special pumps are not required andformerly' necessary has been almost. completely eliminated, therebyimproving the appearance and lowering the cost of the equip ment. .Therectangular form of shell iscon sideredv advantageous cover the"cylindrical m form and all the space therein is economically used andin all, theconstruction is unusually compact and effective.

WVhilein accordance: with the provisions of the statutes, Ihaveillustrated and'described the best form of embodiment of my inventionnow known to me,-'it will be apparentto those skilledin the art thatchanges may be made in the form of the apparatus disclosed withoutdeparting from the spiritiof my invention as set forth in theappendedclaimsand that in some cases certain features of my inventionmaybe used toadvantage without a corre sponding use of other features. Y-Having now described my invention'what I claim as new and desire tosecure by Letters Patent, is i 1.'A'self-contained water heating and deaerating unit comprising a casing having 'a deaerating space in theupper portion thereof, a trayv stack in said space, water distribut ingmeansin said space above said tray stack,

a water storage compartment below and open to said deaeratingspace,.means for passing heating steam into said storage compartment, aplurality of water tubes in said casing-at one side of'said -deaeratingspace andv above said storage compartment, a closed vent condensingchamber in said casing at one side of said deaerating space, andadjacent said' water. tubes. and a'portconnecting said condensingchamber with the upper portion of said deaerating space.

2. A self-contained water heating and deaerating unit, comprisingacasing of simple and compact form hav ng a deaerating com partment inthe upper portion thereof, atray I stack in saidcompartment,water'distribute ing means above said tray stack, a water.storage compartmentgbelow and connected to said deaerating compartment,meansfor passing heating steam into said storage com partment, apluralityof watertubes at one side of said deaerating compartment andabove said storage compartmentysaid tube space b-eing'separated fromsaidcompartments by partitions, means for passing heating steam into contactwith said tubes, avent condensing space at one side of said deaeratingcompartment and above said water tubes, a port-connecting saidcondensing space with the upper portion of said deaerating compartment,and means connected to said condensing space for withdraw-in'gairpassing 661thereto from said deaerating compartment.

8. A self-containediwater heating and de-a aerating unit comprising ashell or casing of simple and compact form and partitions thereindividing the shell interior intosuperposed upper water preheating andvent COI 1-' densing chambers, the latter having an air outlet, 'adeaerating space alongside said chambers anda water storagespacebeneath-v the deaerating and preheating chambers, one

of said partitions being ported to permit-e the passage of air and.vapor into said con densing chamberfrom said .deaeratingspace,

asteam heated water heater for evaporating:

" a portion of the water'entering said storage space from saiddeaerating space, water sup} ply connections comprising tubes in thevent condensing and preheating chambers through which the water ispassed in series into the upper end of the'deaerating space,

and means for supplying heating steam to said preheating chamber to heatthe water passing through the tubes therein. 7 i

4. A self-contained water heating and de-- aerating unit comprising acasing having a deaerating space in the upper portion thereof,

a tray stack in said space, water distributing means above said traystack, a water storage compartment below and open to said deaeratingspace, means for passing steam into said storage compartment, aplurality of U-shaped preheatingtubes atone side of said deaeratingspace and above said storage compartment, a closed vent condensingchamber at one side of and connected to said deaerating space and abovesaid preheating tubes and containing a plurality of U-shaped watertubes,a water supply connection'to said condensing tubes at the front ofsaid casing, a d water conduit means for connectingsaid-condensing-tubes, preheating tubes and said water distributingmeans inseries arranged at and confined to the front end of said casing.

' 5. A self-contained water heating and de-' aerating unit comprising acasing having a deaerating space in the upperportion thereof,

a tray stack in said space, water distributing means above said traystack, a water storage. compartment below and open to said deaerat-' ingspace, means for passing steam into said storage compartment, aplurality ofU-shaped preheating tubes at one side of said deaeratmgspace and above said storage com'part ment, a closed vent condensingchamber at one side of and connected to said deaerating space and abovesaid preheating tubes and containing a plurality of U-shaped"'ivatertubes, a water-supply connection to said con-f: densing tubes at thefront of said casing,j means at the frontof said casing for connect ingsaid condensing tubesand preheating tubes in series, and a conduitarrangedatthe, front end of said casing connecting the discharge end ofsaid preheating tubes to said Water distributing means.

' 6. A self-contained water-heating and de-f at one side of saiddeaerating space and above 7 said storage compartment, a closed ventcon-t densing chamber at one side ofand connected to said deaeratlngspace and above sald preheating compartment and. contalnmg a plu ralityof water tubes, a water supply connection to said condensing tubes atthe front of said; casing, conduit means confined to the front of saidcasing and connecting said con-- densing tubes, preheating tubes andwater distributing means in series, and steam conduit means connected toone side of said preheating compartment, whereby the rear,top, and oneside of said casingare free from external connections.

77.,A self-contained water heating and deaerating unit comprising asubstantially rectangular casing having a deaerating space in the upperportion thereof, a tray stack 111 said space, water distributing meansin said space above said tray stack and arranged to spray water ontosaid tray stack, a water storage compartment below and open to saiddeaerating space, a control float in said storage compartment, aplurality of steam tubes in said storage compartment, a vent con densingchamber in said casing at one side of' said deaerating space andseparated therefrom, a port connecting said condensing chamber with theupper portion of said de aerating space, and door means in the frontwall of said casing provlding access to said the opposite end of thetray, whereby in stacking said trays alternate trays must be reversedtopermit the lugs thereon to be positioned in the proper notches in anadj a cent tray.

9. A tray stack adapted for use in liquid treating apparatus andconsisting of a plurality of superposed trays wholly similar in form,each of said trays having one or more slotted overflow openings formedthereln,

and means insuring a stable stack formation of the trays and a verticalstaggering of the overflow openings in superposed adjacent trays whensaid trays are arranged horizontally and stacked, comprising a pluralityof vertically projecting lugs formed on each tray adjacent oppositeperipheral portions thereof, a lug adjacent one of said peripheralportions being differently positioned relative to the correspondingportion of said periphery. from a lug adjacent the opposite peripheralportion, and each ofsaid trays having a plurality of recesses formedtherein adjacent said opposite, peripheral portions for receivmg thelugs of anadjacent tray of said stack, each of said recesses beinglocated at a point relative to one of said peripheral portionscorresponding to the location of a lug on the oppositeside of said'trayrelative to said opposite peripheral portion, whereby in stacking saidtrays alternate trays must be reversed in position to permit each lugthereon to be properly positioned in a correspending recess in anadjacent tray of the stack.

Signed atFort Wayne, in the county of Allen and State of Indiana this9th day of October, A. D. 1928.

' PERCY S. LYONV l tray stack and float and through which the trays andfloat can be removed.

8. A tray stack adapted for use in liquid degasifying apparatus andformed by a plurality of superposed shallow trays of rectan V gular formand wholly similar in construction, each of said trays having aplurality of transversely spaced slots extending longitudinally thereofand symmetrically arranged relative to a line parallel to thelongitudinal center line thereof, and means insuring a staggering of theslots in superposed adjacent trays when said trays are arrangedhorizontally and stacked consisting of lugs on one side of each trayadjacent the ends thereof, said' lugs being spaceddifferently from thecorresponding tray ends, flanges projecting from the opposite side ofeach tray adjacent the ends thereof, and notches P formed in saidflanges for receiving'said lugs therein, each of said notches beingpositioned relative to the adjacent tray end a distance correspondlng tothespacing of the lug at

